The ATV-DVWK-A 131E standard defines a deep feature as the comprehensive, four-part calculation of secondary settling tank depths (
ATV-DVWK-A 131E is a fundamental German standard providing a mathematical framework for dimensioning single-stage activated sludge plants. It dictates the design of biological reactors and secondary settlers based on sludge age and nutrient removal targets, with updated versions prioritizing COD over BOD5cap B cap O cap D sub 5 . For detailed technical guidelines, visit Studocu . Atv DVWK A 131 e | PDF - Scribd Atv Dvwk A 131 E.pdf